DragonFlyBSD

I keep saying reproductible panics running 4 poudriere jobs on a Xeon-E3 (8 threads) / DragonFly 3.3 system

Backtrace:

get_mycpu () at ./machine/thread.h:69
69 __asm ("movq %%gs:globaldata,%0" : "=r" (gd) : "m"(_mycpu__dummy));
(kgdb) #0 _get_mycpu () at ./machine/thread.h:69
#1 md_dumpsys (di=<optimized out>)
at /usr/src/sys/platform/pc64/x86_64/dump_machdep.c:265
#2 0xffffffff804f5d12 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:913
#3 0xffffffff804f6376 in boot (howto=260)
at /usr/src/sys/kern/kern_shutdown.c:373
#4 0xffffffff804f662d in panic (fmt=0xffffffff80906d4b "%s")
at /usr/src/sys/kern/kern_shutdown.c:819
#5 0xffffffff808b6368 in trap_fatal (frame=0xffffffe24264b258,
eva=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/trap.c:1029
#6 0xffffffff808b6e71 in trap (frame=0xffffffe24264b258)
at /usr/src/sys/platform/pc64/x86_64/trap.c:754
#7 0xffffffff808a0c3f in calltrap ()
at /usr/src/sys/platform/pc64/x86_64/exception.S:188
#8 0xffffffff808b0e19 in db_read_bytes (addr=7665811765312320823, size=8,
data=0xffffffe24264b338 "")
at /usr/src/sys/platform/pc64/x86_64/db_interface.c:240
#9 0xffffffff802a735d in db_get_value (addr=7665811765312320823, size=8,
is_signed=0) at /usr/src/sys/ddb/db_access.c:58
#10 0xffffffff808b1ab5 in db_nextframe (ip=<optimized out>,
fp=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/db_trace.c:234
#11 db_stack_trace_cmd (addr=<optimized out>, have_addr=<optimized out>,
count=<optimized out>, modif=<optimized out>)
at /usr/src/sys/platform/pc64/x86_64/db_trace.c:440
#12 0xffffffff808b1c77 in print_backtrace (count=1113895736)
at /usr/src/sys/platform/pc64/x86_64/db_trace.c:452
#13 0xffffffff804f65f8 in panic (fmt=0xffffffff80906d4b "%s")
at /usr/src/sys/kern/kern_shutdown.c:812
#14 0xffffffff808b6368 in trap_fatal (frame=0xffffffe24264b648,
eva=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/trap.c:1029
#15 0xffffffff808b6586 in trap_pfault (frame=0xffffffe24264b648, usermode=0)
at /usr/src/sys/platform/pc64/x86_64/trap.c:917
#16 0xffffffff808b6c65 in trap (frame=0xffffffe24264b648)
at /usr/src/sys/platform/pc64/x86_64/trap.c:611
#17 0xffffffff808a0c3f in calltrap ()
at /usr/src/sys/platform/pc64/x86_64/exception.S:188
#18 0xffffffff8057c4bb in vop_nremove (ops=0xffffffe22c69e680,
nch=0xffffffe24264b948, dvp=0xffffffe24264b718, cred=0xffffffe22d5b7958)
at /usr/src/sys/kern/vfs_vopops.c:1528
#19 0xffffffff80573da9 in kern_rename (fromnd=0xffffffe24264b948,
tond=0xffffffe24264b8d8) at /usr/src/sys/kern/vfs_syscalls.c:3779
#20 0xffffffff80573f2e in sys_rename (uap=0xffffffe24264ba08)
at /usr/src/sys/kern/vfs_syscalls.c:3805
#21 0xffffffff808b75e3 in syscall2 (frame=0xffffffe24264bab8)
at /usr/src/sys/platform/pc64/x86_64/trap.c:1238
#22 0xffffffff808a0e8b in Xfast_syscall ()
at /usr/src/sys/platform/pc64/x86_64/exception.S:323
#23 0x000000000000002b in ?? ()